When public employees, especially police, fire, toll and emergency workers, hide away somewhere away from the public, possibly together, in order to goof off on the job, or pad their hours, especially for overtime pay.

Joe pulled in 2000 hours of overtime last year from cottaging on the job.

When a man goes into a toilet to take a shit. He puts a carrier bag on the floor and his friend steps inside it. Then the man taking a shit starts sucking his cock. So, if some looks underneath the door it looks like someone is sat taking a shit with their shopping between their legs.

Guy 1 - fancy going cottaging?
Guy 2 - Let me get my carrier bag
Guy 3 - What are they doing in there? let me take a peak under the door. Ahhh He's taking a shit, must of just got back from the shops.

'Ronald was exploring the multifarious mechanical advantages of different cottaging positions'

Ronald: 'I have, by trial and error, come to the conclusion that the plastic bag method is by far the most convenient and pleasurable method. Nevertheless, it lacks the anonymity typically desired for such an experience, thus some may prefer the "hole in the wall" method, as it adds a sense of discretion and adventure.'

Son: 'Daddy, what's cottaging?'
Father: 'Well son, when two men love each other very much, they secretly meet in public lavatories and do the dirty. Through a hole in the wall. The excitment is unparalleled.'